Question

what is the driving force of the plate tectonic shifting beneath the earths crust?
gravity
convection
convergent
magnetic

Explanation:

The driving force behind plate - tectonic shifting is mantle convection. Heat from the Earth's interior causes the mantle to convect, which in turn moves the tectonic plates above it. Gravity is not the main driving force for plate movement. "Convergent" is a type of plate boundary, not a driving force. Magnetic forces do not drive plate tectonics.

Answer:

B. Convection